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STS1 Pipe-clip Temperature Sensors

These are IP67 rated pipe-clip temperature sensors from Semitec.  By using our fast-response FT series thin-film thermistor, the sensor has a time constant of ≤1s.

Designed to be waterproof with excellent thermal contact onto metal pipework using the spring clip. Easy to push on, this sensor can be fitted to 12~22mm diameter pipes using various clip sizes.


  • Gas boilers
  • Electric showers
  • Anti-legionnaires systems
  • Instant water heaters


  • Fast response design (Tc ≤ 1s)
  • Accuracy ±1°C at 85°C
  • IP67 Rated, excellent stability
  • Clip-on pipes from 12 ~ 22mm diameter
  • Operating range up to +120°C
ATC Semitec STS1 Pipe clip temperature sensor

Technical Specifications

NTC Thermistor Series FT – Thin Film NTC
Temperature Range -20°C/+120°C
Sensor Accuracy ±1°C at 85°C
Sensor Material 316 stainless steel
Connectors 2.7 x 0.5mm terminals